KEPCO BHK 500-0.4MG Operator's Manual
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KEPCO BHK 500-0.4MG Operator's Manual

Bhk-mg full rack series
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OPERATOR'S MANUAL
VOLTAGE/CURRENT-STABILIZED DC SOURCE
KEPCO INC.
An ISO 9001 Company.
IMPORTANT NOTES:
1)
This manual is valid for the following Model and associated serial numbers:
MODEL
2)
A Change Page may be included at the end of the manual. All applicable changes and
revision number changes are documented with reference to the equipment serial num-
bers. Before using this Instruction Manual, check your equipment serial number to identify
your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-
mentation Office in New York, (718) 461-7000, requesting the correct revision for your par-
ticular model and serial number.
3)
The contents of this manual are protected by copyright. Reproduction of any part can be
made only with the specific written permission of Kepco, Inc.
Data subject to change without notice.
©2016, KEPCO, INC
P/N 243-1322j
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A.  TEL (718) 461-7000  FAX (718) 767-1102
BHK-MG FULL RACK SERIES

POWER SUPPLY

BHK 300-0.6MG
BHK 500-0.4MG
BHK 1000-0.2MG
BHK 2000-0.1MG
SERIAL NO.
email: hq@kepcopower.com  World Wide Web: http://www.kepcopower.com
MODELS
REV. NO.
KEPCO
THE POWER SUPPLIER™
®

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Summary of Contents for KEPCO BHK 500-0.4MG

  • Page 1: Power Supply

    Data subject to change without notice. KEPCO ® ©2016, KEPCO, INC P/N 243-1322j THE POWER SUPPLIER™ KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A.  TEL (718) 461-7000  FAX (718) 767-1102 email: hq@kepcopower.com  World Wide Web: http://www.kepcopower.com...

  • Page 3: Declaration Of Conformity

    Voltage Dips, Fast Transient_EFT, EN61000-4-5, IEC61000-4-3, IEC61000-4-6, ESD, Surge Immunity, Radiated Immunity IEC61000-4-8 (designed to meet), Conducted Immunity, Magnetic Field Immunity (designed to meet) Manufacturer's Name: KEPCO, INC. Manufacturer's Address: 131-38 SANFORD AVENUE FLUSHING NY 11355 Importer's Name: Importer's Address: Type of Equipment:...
  • Page 4 There are no user or operator serviceable parts within the product enclosure. Refer all servicing to qualified and trained Kepco service technicians. 228-1351 COND/CONFORM 032816...
  • Page 5 SAFETY INSTRUCTIONS 1. Installation, Operation and Service Precautions This product is designed for use in accordance with EN 61010-1 and UL 3101 for Installation Category 2, Pollution Degree 2. Hazardous voltages are present within this product during normal operation. The prod- uct should never be operated with the cover removed unless equivalent protection of the operator from accidental contact with hazardous internal voltages is provided: There are no operator serviceable parts or adjustments within the product enclosure.

  • Page 7: Table Of Contents

    SECTION 3 - OPERATION General..............................3-1 Local Mode Operation ..........................3-1 3.2.1 Front Panel Keypad and LCD......................3-1 3.2.1.1 Command Entry Status........................ 3-1 3.2.1.2 Data Entry Status......................... 3-1 3.2.1.3 Display (LCD)..........................3-1 3.2.1.4 Keypad Functions ........................3-2 BHK 500-0.4MG SVC 020498...
  • Page 8 Common Commands/Queries ......................3-24 3.5.3 SCPI Subsystem Command/Query Structure................... 3-24 3.5.3.1 ABORt Subsystem ........................3-24 3.5.3.2 INITiate Subsystem........................3-24 3.5.3.3 LIST Subsystem.......................... 3-24 3.5.3.4 MEASure Subsystem ........................3-24 3.5.3.5 OUTPut Subsystem ........................3-24 3.5.3.6 Instrument Subsystem ........................ 3-24 BHK 500-0.4MG SVC 032816...
  • Page 9 Calibration Procedures Using Front Panel Keypad ................. 4-1 4.3.1 Voltage Calibration ..........................4-2 4.3.2 High Current Calibration ........................4-3 4.3.3 Low Current Calibration ........................4-4 Calibration Using IVI Driver ........................4-5 4.4.1 Setup ..............................4-5 4.4.2 Main Control Panel ..........................4-6 BHK 500-0.4MG SVC 020498...
  • Page 10 [SOURce:]LIST:CURRent Command ..................... B-5 B.22 [SOURce:]LIST:CURRent? Query......................B-6 B.23 [SOURce:]LIST:CURRent:POINts? Query ..................... B-6 B.24 [SOURce:]LIST:DIRection Command..................... B-6 B.25 [SOURce:]LIST:DIRection? Query ......................B-6 B.26 [SOURce:]LIST:DWELl Command ......................B-6 B.27 [SOURce:]LIST:DWELl? Query ......................B-6 B.28 [SOURce:]LIST:DWELl:POINts? Query ....................B-6 BHK 500-0.4MG SVC 032816...
  • Page 11 SYSTem:COMMunication:SERial:BAUD? Query................... B-17 B.75 SYSTem:COMMunication:SERial:ECHO Command ................B-17 B.76 SYSTem:COMMunication:SERial:ECHO? Query .................. B-17 B.77 SYSTem:COMMunication:SERial:PACE Command ................B-17 B.78 SYSTem:COMMunication:SERial:PACE? Query................... B-18 B.79 SYSTem:COMMunication:SERial:PROMpt CommanD ................. B-18 B.80 SYSTem:COMMunication:SERial:PROMpt? Query................B-18 B.81 SYSTem:ERRor? Query ........................B-18 BHK 500-0.4MG SVC 020498...
  • Page 12 SYSTem:KLOCk? Query ........................B-19 B.86 SYSTem:PASSword:CENable Command ....................B-19 B.87 SYSTem:PASSword:CDISable Command ..................... B-19 B.88 SYSTem:PASSword:NEW Command ....................B-19 B.89 SYSTem:PASSword:STATe? Query ...................... B-19 B.90 SYSTem:SECurity:IMMediate Command....................B-20 B.91 SYSTem:VERSion? Query ........................B-20 B.92 TRIGger:SOURce Command ......................... B-20 BHK 500-0.4MG SVC 032816...
  • Page 13 Calibration Controls ............................ 4-7 Password Entry ............................4-8 Voltage Calibration............................4-8 Current Magnifier Window .......................... 4-9 GPIB Commands ............................A-3 Programming the Output..........................B-3 Using Display Commands.......................... B-3 Using LIST Commands and Queries ......................B-8 Programming Current ..........................B-12 BHK 500-0.4MG SVC 032816...

  • Page 14: List Of Figures

    LIST OF FIGURES FIGURE TITLE PAGE Programming Voltage..........................B-14 Using Status Commands and Queries ....................... B-15 Using System Commands and Queries ..................... B-19 viii BHK 500-0.4MG SVC 032816...
  • Page 15 SCPI Subsystem Command/query Index ....................B-1 Operation Condition Register, Operation Enable Register, and Operation Event Register Bits ......................B-14 Questionable Event Register, Questionable Condition Register and Questionable Condition Enable Register Bits .................. B-16 Error Messages ............................B-20 BHK 500-0.4MG SVC 020498...

  • Page 16: Safety Messages

    There are no operator serviceable parts inside the case. Service must be referred to authorized personnel. Using the power supply in a manner not specified by Kepco. Inc. may impair the protection provided by the power supply. Observe all safety precautions noted throughout this manual. The following table lists sym- bols used on the power supply or in this manual where applicable.
  • Page 17 FIGURE 1-1. BHK-MG SERIES PROGRAMMABLE POWER SUPPLY BHK-MG032816...
  • Page 18 BHK-MG032816...

  • Page 19: Section 1 - Introduction

    SECTION 1 - INTRODUCTION SCOPE OF MANUAL This manual contains instructions for the installation and operation of the BHK-MG series of 200W output power stabilized voltage or current, d-c power supplies manufactured by KEPCO, Inc., Flushing, New York, U.S.A. WARNING...

  • Page 20: Model Parameters

    3.33 0.013 BHK 300-0.6MG 0 - 300 0.025 0 - 60 33.3 0.008 0 - 400 0.012 BHK 500-0.4MG 0 - 500 0.0625 0 - 40 0.007 0 - 200 0.005 BHK 1000-0.2MG 0 - 1000 0.25 0 - 20 0.003...
  • Page 21 D-C Isolation voltage BHK 300-0.6MG, 1KV d-c or p-p plus max. Between either output terminal and ground BHK 500-0.4MG, output voltage BHK 1000-0.2MG BHK 2000-0.1MG 0.5KV d-c or p-p plus max. Between either output terminal and ground...
  • Page 22 Output Display Output voltage is displayed with two decimals for BHK 300-0.6MG and BHK 500-0.4MG and one decimal for BHK 1000-0.2MG and BHK 2000-0.1MG.Output current for all models is displayed with two deci- mals when current range is set to High, and three decimals when cur- rent range is set to Low.
  • Page 23 TABLE 1-2. BHK-MG 200W SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION GENERAL (ENVIRONMENTAL) CHARACTERISTICS Temperature Operating 0° to +50° C Storage -20° to +70° C Humidity Non condensing 0 to 95% RH operating & storage Shock 20g, 11msec ±50% Non operating, 3-axes, half sine 3 shocks each axis Vibration...

  • Page 24: Bhk Series Power Supply, Mechanical Outline Drawing

    FIGURE 1-2. BHK SERIES POWER SUPPLY, MECHANICAL OUTLINE DRAWING (SHEET 1 OF 2) BHK-MG (OPR) 032816...
  • Page 25 FIGURE 1-2. BHK SERIES POWER SUPPLY, MECHANICAL OUTLINE DRAWING (SHEET 2 OF 2) BHK-MG (OPR) 032816...

  • Page 26: Features

    FEATURES 1.4.1 LOCAL CONTROL Front panel keypad entries and an LCD type display are utilized for setting and/or adjusting out- put voltage and current under local control. The keypad's keys are organized to either directly execute commands, or to introduce a program that can either be run once or cycled. Calibration of the unit is facilitated by a password -protected, menu-driven procedure from the front panel.

  • Page 27: Overvoltage/Overcurrent Protection

    The BHK-MG Power Supply can be programmed not to exceed user-defined values that can be lower than the maximum values. For example, the BHK 500-0.4MG, which has maximum output values of 500V d-c, 0.4A d-c, can be limited to 100V d-c, 0.1A d-c for working with circuitry that might be damaged by higher levels.

  • Page 28: Nonvolatile Storage Of Programmed Sequences Or Active Settings

    Output current of the power supply can be scaled down by a factor of 10, while at the same time increasing the current resolution by a factor of 10. For example the BHK 500-0.4MG has maxi- mum output values of 500V d-c, 0.4A d-c and a current resolution of 0.1mA d-c; scaling down the output current results in a power supply with maximum values of 500V d-c, 0.04A d-c with a...

  • Page 29: Built-In Protection

    1.4.10 BUILT-IN PROTECTION BHK-MG Series Power Supplies provide built-in protection against the following: a. Overtemperature of the pass element. Heatsink temperature is monitored. If an overtem- perature condition is maintained for more than 0.5ms, the following actions are initiated: the pass element is cut off and latched off, the output capacitor is discharged, the LCD displays the error message “BHK FAILURE“...

  • Page 30: Current Sink Capability

    1.4.11 CURRENT SINK CAPABILITY BHK-MG 200W Series power supplies are able to sink up to 5% of the nominal current when in voltage mode and 50% of the unit's maximum rated current when in current mode. The fixed current mode sink value is model dependent and has a tolerance of 10%. Since negative cur- rent is not displayed on the front panel meter, it is transparent to the user when the unit enters sink mode.

  • Page 31: Equipment Supplied

    TABLE 1-3. CONNECTOR A2J5 SIGNAL DESCRIPTIONS SIGNAL PIN. NO. VALUE TYPE 0V for HIGH current scale Collector of PNP transistor (A2Q3) Current Scale Flag > +13V for LOW current scale through 1K resistance.* < -11V for steady or step-up output >...

  • Page 32: Accessories

    There are no operator serviceable parts inside the case. Service must be referred to authorized personnel. Using the power supply in a manner not specified by Kepco. Inc. may impair the pro- tection provided by the power supply. Observe all safety precautions noted throughout this man- ual.

  • Page 33: Section 2 - Installation

    SECTION 2 - INSTALLATION UNPACKING AND INSPECTION This instrument has been thoroughly inspected and tested prior to packing and is ready for operation. After careful unpacking, inspect for shipping damage before attempting to operate. Perform the preliminary operational check as outlined in PAR 2.5. If any indication of damage is found, file an immediate claim with the responsible transport service.

  • Page 34: Controls, Indicators, And Connectors

    TABLE 2-1. CONTROLS, INDICATORS, AND CONNECTORS CONTROL, INDICATOR, FUNCTION CONNECTOR FRONT PANEL A-C line indicator Lights to indicate unit turned on and a-c power applied. 2 x 16 character Liquid Display with LED backlight. Shows voltage, current mode, settings, menu, program, etc. Keypad 24 keys used for local operation of the power supply;...

  • Page 35: Bhk-Mg Series, Rear Panel Controls And Connections

    TABLE 2-3. RS232C PORT INPUT/OUTPUT PIN ASSIGNMENTS Adapter Cable (P/N KIT 219-0436) CONNECTOR SIGNAL NAME FUNCTION FUNCTION Return Signal Ground Not Used Not Used Receive Data Transmit Data Transmit Data Receive Data Data Terminal Ready (protocol not used) RS 232 Return Signal Ground PORT...

  • Page 36: Status Port Connector Pin Assignments

    TABLE 2-4. STATUS PORT CONNECTOR PIN ASSIGNMENTS CONNECTOR SIGNAL NAME FUNCTION Not Used. Not Used. Not Used. Emitter Emitter of LED-transistor optocoupler. Notifies host com- puter of absence of a-c input or a major power supply fail- ure, active “low” (see PAR 1.4.10), requires pin 7 to be connected to the “+“...

  • Page 37: Voltage Programming Terminal Strip Tb2, Terminal Assignments

    TABLE 2-6. REAR OUTPUT TERMINAL STRIP TB1 TERMINAL ASSIGNMENTS TERMINAL SIGNAL NAME FUNCTION Positive sense connection + OUT Positive d-c output connection GND NET Grounding network connection Ground (chassis) connection – OUT Negative d-c output connection –S Negative sense connection –...

  • Page 38: Source Power Requirements

    SOURCE POWER REQUIREMENTS WARNING BEFORE APPLYING AC SOURCE POWER TO THE POWER SUPPLY, VERIFY THAT THE LINE VOLTAGE TO BE SUPPLIED MATCHES THE POSITION OF THE AC INPUT SELEC- TOR SWITCH AT THE REAR PANEL (FACTORY DEFAULT IS 115V). This power supply operates with the installed circuit breaker from single phase AC mains power over the specified voltage and frequency ranges without adjustment or modification.

  • Page 39: Lcd Power On Defaults

    Press VSET key. Verify bottom line of LCD reads Vset (=_=_=) 0.0 V. Use number keys to enter nominal output voltage (e.g. for BHK 500-0.4MG, 500V is the nominal output voltage) and press ENTER. Output voltage will be displayed at bottom left of LCD. Verify the LCD reads CV (constant voltage mode).

  • Page 40: Installation

    13. Press OUTPUT ON/OFF key to enable the output of the unit. Verify the LCD reads (constant current mode) and a small value for output voltage (R x 0.001) in volts, o (prog) where R = resistance of shunt in ohms and I = the actual value for current pro- o (prog) grammed in step 12 in milliamperes.

  • Page 41: Source Power Connections

    It is hoped that the preceding paragraphs will be of some assistance in most cases. For help in special applications or difficult problems, consult directly with Kepco's Application Engineering Department. 2.7.4...

  • Page 42: Cable Recommendations

    (these sizes fit the plugs supplied for the front panel output connections). The wire insula- tion must be rated for nominal voltage of the power supply (e.g., 500V for BHK 500-0.4MG). If a float voltage is used, the wire insulation must be rated for the nominal voltage of the power sup- ply plus the float voltage;...

  • Page 43: Local Sensing/Remote Sensing Select

    ground (floating). This configuration is obtained using two 4-terminal links connected as shown in Figure 2-4. NOTE: REGARDLESS OF OUTPUT CONFIGURATION, OUTPUT SENSE LINES MUST BE CONNECTED FOR PROPER OPERATION, EITHER LOCALLY, OR AT THE LOAD (REMOTE). OBSERVE POLARITIES: THE +S TERMINAL (TB1-1) MUST BE CON- NECTED TO EITHER +OUT (TB1-2) (LOCAL) OR +LOAD (REMOTE), AND THE - S TERMINAL (TB1-6) MUST BE CONNECTED TO EITHER –OUT (TB1-5) (LOCAL) OR –LOAD (REMOTE).

  • Page 44: Negative Output, Positive Terminal Grounded

    FIGURE 2-4. LOCAL SENSING, SLOW MODE SELECTED, GROUNDING NETWORK CONNECTED, FLOATING OUTPUT (FACTORY DEFAULT CONFIGURATION) 2.7.5.5 NEGATIVE OUTPUT, POSITIVE TERMINAL GROUNDED To configure the BHK-MG as a negative output power supply (referenced to ground), connect the positive output terminal to ground: use a 5-terminal link to connect TB1-4 (GND - CHASSIS) to TB1-2 (+OUT).

  • Page 45: Operating Configuration

    Table 2-9 lists the location of the internal jumpers and their function. This information is provided for reference purposes only, to indicate the configuration options available. Do not attempt to alter the jumper configuration. For assistance in changing any jumper-selected parameter con- tact Kepco Applications Engineering. TABLE 2-9. INTERNAL JUMPER CONFIGURATION DEFAULT...

  • Page 47: Section 3 - Operation

    SECTION 3 - OPERATION GENERAL This section explains how to operate the BHK-MG Power Supply. The power supply can be operated either in Local mode using the front panel keypad and LCD (PAR. 3.2), or in Remote mode using either SCPI commands via the GPIB bus (PARs. 3.3, 3.5) or analog programming via the rear panel terminals (PAR 3.6).

  • Page 48: Keypad Functions

    TABLE 3-1. LCD MESSAGES LOCATION MESSAGE DESCRIPTION Top left Loc/Rem Digital control status: either Remote or Local top right CV/CC Constant voltage mode/constant current mode in command entry n.nV Actual output voltage Bottom left: In data entry (parameter) e.g. OVset if OV SET key was pressed. Bottom middle: Command entry status (:_:_:)
  • Page 49 TABLE 3-2. KEY FUNCTIONS (CONTINUED) POWER SUPPLY REFERENCE DESCRIPTION STATUS ACTIVE PARAGRAPH Press to enter Menu commands: press repeatedly to scroll through Menu func- (1) 3.2.5, tions: (1) set LCD contrast, (2) GPIB address, (3) Baud Rate, (4) Loop Back (2) 3.3.3, Test, (5) DCL control, (6) Power-Up Digital DC Output on/off, (7) speaker on/off, (3) 3.4.1...

  • Page 50: Turning The Power Supply On

    When the power supply is turned on, the LCD briefly displays self test messages, then displays the power supply type on the top line (e.g., Kepco BHK 500) and GPIB addr. = nn on the bottom line, where BHK 500 is model BHK 500-0.4MG and nn is the GPIB address (factory default GPIB address = 6).

  • Page 51: Error Conditions

    I**** I**** 0.000V (:_:_:) 0.000A 0.000V (:_:_:) 0.000A (a) Default Display State for OUT OFF (b) Default Display State for OUT ON @ Pwr-Up Selection (PAR. 3.2.7.4) at Pwr-Up Selection (PAR. 3.2.7.4) NOTE: (:_:_:) indicates blinking colon (:), Command Entry status (=_=_=) indicates blinking equal sign (=), Data Entry status **** indicates previously set current scale.

  • Page 52: Adjusting Lcd Contrast

    The BHK-MG incorporates a “keypad lockout” command which allows the LOCAL key to be dis- abled during remote operation, preventing inadvertent setting of the power supply to Local mode. When the keypad is locked, the LCD displays RwL in place of LOC. If the keypad is locked, it must be unlocked either by a remote command (see Appendix B, PAR.

  • Page 53: Remote Shutdown Using External Trigger Port

    than 0.3% of full scale for the selected range within 25 seconds. For 15 seconds, the top line of the LCD alternately flashes the messages DIGITAL IS OFF and SET ANALOG OFF, while the bottom line of the LCD shows the actual output voltage and current. After 15 seconds, the bot- tom line will alternate a message showing the time remaining before shutdown (e.g POWER OFF 9 SEC) with the message SET ANALOG OFF.

  • Page 54: Setting Output Voltage Or Current

    (I max) to a value ten times less (I max/10): e.g., for the BHK 500-0.4MG power supply the full scale current can be either 400mA or 40mA. The relative accuracy and resolution are the same for both current programming scales because the power supply has two independent sensing resistors and the calibration is done separately;...

  • Page 55: Setting Overvoltage Or Overcurrent Protection

    With the power supply in command entry status (:_:_:), press MENU until the top line of the display presents the message FS CURRENT (=_=_=) <n> mA, where <n> represent the actual full scale of the current (I max or I max/10);...

  • Page 56: Changing Maximum Voltage Or Current Value

    The default maximum values of voltage and current are determined by the model, e.g., 500V and 400mA for the BHK 500-0.4MG. These values can be lowered by the user to prevent inad- vertent damage to a specific circuit under test by establishing software limits through the use of the MENU key.

  • Page 57: Recalling Stored Output Settings

    and 40 locations for Low range which are swapped each time the range is changed, so that only one set of 40 locations is active, depending on the current scale selected. With the power supply in command entry status (:_:_:), press STORE key. The LCD reads STORE mem (=_=_=) nn where nn is the memory location where the settings are to be stored.

  • Page 58: 3.2.16.1.1 Modifying Programmed Time Interval

    The top line of the LCD indicates the active memory location, e.g. ViewVAL Mem <n> where n is the memory location previously chosen. The bottom line of the LCD indicates the parameter on the left (Iset, Vset, OVset, OCset, TIMEval, NEXT STEP), the parameter’s value on the right, and data entry status (=_=_=) in the middle.

  • Page 59: Memory Location Worksheet

    TABLE 3-4. MEMORY LOCATION WORKSHEET OCset OV set I SET V SET TIMEval NEXT STEP MEMORY (Overcurrent (Overvoltage (Current) (Voltage) (0. to 655.35) (Next location LOCATION Protection) Protection) (mA) (Sec) to execute) (mA) 3-13 BHK-MG (OPR) 032816...

  • Page 60: Cycling A Program

    The LCD top line shows LOC to indicate local mode, aa bb where aa is the memory location just executed, bb is the NEXT STEP location, and shows CV (constant voltage) or CC (constant current) to indicate the actual operating mode. The LCD bottom line shows the output voltage and current measurements for the location just executed, and (:_:_:) indicates command sta- tus.

  • Page 61: Calibration

    TABLE 3-5. SAMPLE PROGRAM (MODEL BHK-MG 500-0.4MG) OC set OV set I SET V SET TIMEval NEXT STEP MEMORY (Overcurrent (Overvoltage (Current) (Voltage) (0.01 to 655.35) (Next location LOCATION Protection) Protection) (mA) (Sec) to execute) (mA) NOTE: For each cell of a program OC set and OV set must be at least 2% above the maximum values of voltage and cur- rent expected at the load.

  • Page 62: Ieee 488 (Gpib) Bus Command Mode Messages

    TABLE 3-6. IEEE 488 (GPIB) BUS INTERFACE FUNCTIONS (CONTINUED) SUBSET FUNCTION COMMENTS SYMBOL Listener Basic listener, unaddress if MTA (My Talk Address) (one-byte address). Complete Capability. The interface sets the SRQ line true if there is an Service Request enabled service request condition. Complete capability.

  • Page 63: Dcl Control

    TABLE 3-8. IEEE 488 (GPIB) BUS DATA MODE MESSAGES MNEMONIC MESSAGE DESCRIPTION COMMENTS Data Byte Received or Sent Received or Sent End of String Received or Sent Request Service Sent Status Byte Sent 3.3.2 DCL CONTROL The device clear (DCL) and selected device clear can be set to operate in two modes. In the “output = 0”...

  • Page 64: Bhk-Mg Visa Instrument Driver

    This will improve response time and reduce undesirable transients. For those power supplies that employ relays (Kepco's MBT with “R” option, MAT and MST) this will also increase the life of the relay.

  • Page 65: Making Sure The Previous Command Is Complete

    3. Never program both the active and complementary limit parameter to zero. This can result in long response times. Set the active parameter to zero and the complementary limit parame- ter to a minimum, e.g., 10% of maximum, to ensure that the active mode is defined. 3.3.6.2 MAKING SURE THE PREVIOUS COMMAND IS COMPLETE Some SCPI commands require a flash memory update and can take an indeterminate amount...

  • Page 66: Rs232-C Operation

    #include <formatio.h> #include <utility.h> #include <gpib.h> #include <ansi_c.h> /*Overhead for the use of a NATIONAL INSTRUMENTS gpib interface */ int unit_desc; // handle for the national instruments controller int GPIbus=0; // GPIB card 0 int adr=6; // Power Supply address char status_byte;...

  • Page 67: Setting Rs 232 Baud Rate

    To change baud rate refer to PAR’s. B.73 and B.74. To select prompt refer to PAR’s. B.79 and B.80. To select echo refer to PAR’s. B.75 and B.76. To select XON/XOFF, refer to PAR’s. B.77, B.78. 3.4.1 SETTING RS 232 BAUD RATE When the power supply is in local mode, command entry status , press MENU key until LCD displays BAUD RATE =.

  • Page 68: Echo Mode

    FIGURE 3-3. RS 232 IMPLEMENTATION Only three control characters (characters between 00 and 1F ) are acknowledged by the power supply: • Carriage Return (CR, 0D • Line Feed (LF, 0A • Back Space (BS, 08 BS deletes the last character entered, with the exception of CR or LF characters. Either the CR or LF character acts as the line terminator, initiating parsing of the ASCII data sent to the BHK- MG by the command originator.

  • Page 69: Isolating Rs 232 Communication Problems

    If each of the above steps is completed successfully, the problem lies in the computer hard- ware and/or software. Refer to the Product Support area of the Kepco website for additional information regarding RS 232 communications problems: www.kepcopower.com/support.

  • Page 70: Common Commands/Queries

    formatted data; the data can contain information regarding operating parameters, power supply state, status, or error conditions. 3.5.2 COMMON COMMANDS/QUERIES Common commands and queries are defined by the IEEE 488.2 standard to perform overall power supply functions (such as identification, status, or synchronization) unrelated to specific power supply operation (such as setting voltage/current).

  • Page 71: Status Subsystem

    SCPI program messages (commands from controller to power supply) consist of one or more message units ending in a message terminator (required by Kepco power modules). The message terminator is not part of the syntax; it is defined by the way your programming language indi- cates the end of a line (“newline”...

  • Page 72: Keyword

    rated by a space; the parameter is usually numeric (e.g., CURR 5<newline>), but may also be a string (e.g., OUTP ON<newline>). Figure 3-4 illustrates the message structure, showing how message units are combined. The following subparagraphs explain each component of the message structure.

  • Page 73: Data

    KEYWORD DATA SEPARATOR ROOT SPECIFIER DATA MESSAGE UNIT SEPARATOR MESSAGE UNIT SEPARATOR DATA DATA SEPARATOR ROOT SPECIFIER KEYWORD KEYWORD KEYWORD SEPARATOR QUERY INDICATOR MESSAGE TERMINATOR KEYWORD CURR:LEV 3.5;:OUTP ON;:CURR?<NL> MESSAGE UNIT FIGURE 3-4. MESSAGE STRUCTURE 3.5.4.4 DATA Some commands require data to accompany the keyword either in the form of a numeric value or character string.

  • Page 74: Tree Diagram Of Scpi Commands Used With Bhk-Mg Power Supply

    ROOT : (colon) SYSTem subsystem ABORt subsystem [SOURce:] subsystem SYSTem ABORt [SOURce:] :BEEP CURRent  :COMM:GPIB:ADDR val INITiate subsystem [:LEVel] :COMM:GPIB:ADDR? [:IMMediate] INITiate :COMM:SER [:AMPLitude] val [:IMMediate]  :BAUD val [:AMPLitude]? MIN, MAX :CONTinuous bool :BAUD? :TRIGgered :CONTinuous?  :ECHO [:AMPLitude] val :ECHO? ON, OFF [:AMPLitude]?

  • Page 75: Root Specifier

    • new line (<NL>), ASCII 10 (decimal) or 0A (hex) NOTE: Kepco power supplies require a message terminator at the end of each program mes- sage. The examples shown in this manual assume a message terminator will be added at the end of each message. Where a message terminator is shown it is represented as <NL>...

  • Page 76: Program Message Syntax Summary

    STAT:OPER:COND?;ENAB 16<NL> After the OPER:COND? message unit, the parser moves in one level from OPER, allowing the abbreviated notation for STAT:OPER:ENAB. 3.5.6 PROGRAM MESSAGE SYNTAX SUMMARY • Common commands begin with an asterisk (*). • Queries end with a question mark (?). •...

  • Page 77: Remote Programming Using Analog Programming Terminals

    /**************************************************************************/ Sample Program For KEPCO power supply, using National Instruments GPIB interface card and IBM PC or compatible computer /**************************************************************************/ #include <stdio.h> #include "decl.h" char rd_str[80]; // Input buffer char dat_str[80]; // Output buffer bd,adr; main() { adr = ibfind("DEV6");...

  • Page 78: Analog Voltage Programming, Simplified Diagram

    FIGURE 3-7. ANALOG VOLTAGE PROGRAMMING, SIMPLIFIED DIAGRAM FIGURE 3-8. ANALOG CURRENT PROGRAMMING, SIMPLIFIED DIAGRAM 3-32 BHK-MG (OPR) 032816...

  • Page 79: Analog Programming Warnings And Cautions

    GPIB bus) since the two programming methods are summed together. For example, for the BHK 500-0.4MG Power Supply, if the output is programmed digitally to 200V, and an analog signal which would produce a 100V output is applied to the uncommitted ampli- fied, the output would go to 300V (assuming the value of the load and the programmed value of output current allow the power supply to remain in voltage mode).
  • Page 80 b. Use high voltage rated cables (at least 3kV) for all connections, even for programming connections. Where required use twisted pair cable or shielded single or pair cable (shield to chassis), rated for high voltage. c. Even though the BHK-MG Power Supply will discharge the output capacitor at turn-off, verify that the output is safe before making any attempt to connect or disconnect the load.

  • Page 81: Programming With External Resistance

    • If the power supply must operate isolated from ground (floating), any external equipment connected to the ANALOG PROGRAMING TERMINALS must also be isolated (battery operated or connected to a-c source power using an isolating transformer). Safety Messages The BHK-MG can be controlled by digital and/or analog inputs. When OUTPUT is set to off from the keypad or the GPIB, an analog input will still produce an output from the BHK-MG which will be indicated on the LCD.

  • Page 82: Analog Programming Of Output Current (Current Mode Or Current Limit (Voltage Mode) Using Resistance

    DP (C), is from the current portion of the digital programming cir- cuitry (either from the keypad or the GPIB bus). TABLE 3-10. FEEDBACK RESISTOR AND CURRENT SENSING RESISTOR VALUES RESISTOR SCALE BHK 500-0.4MG BHK 1000-0.2MG BHK 2000-0.1MB Voltage Feedback Resistor R 500K*...

  • Page 83: Voltage Mode

    3.6.2.1 VOLTAGE MODE With the power supply in voltage mode (see Figure 3-9) and the digitally programmed output voltage at zero, varying the external resistor from 0 to 10K causes the output voltage of the power supply to vary linearly from 0 to Eomax with a slope of (0.0001 x Eomax) volts per ohm. The following equation gives the output voltage as determined by external resistance R Eo = (–1) (10V) x (R...

  • Page 84: Programming With External Voltage Using A Low Impedance Voltage Source

    3.6.3 PROGRAMMING WITH EXTERNAL VOLTAGE USING A LOW IMPEDANCE VOLTAGE SOURCE Figures 3-11 through 3-14 are simplified diagrams of the BHK-MG showing the jumper configu- ration and external connections required for analog programming using a low impedance volt- age source. Figure 3-11 shows an isolated voltage source, Figure 3-12 shows a grounded voltage source for programming of either output voltage when the unit is in voltage mode, or voltage limit when the unit is in current mode.

  • Page 85: Analog Programming Of Output Voltage (Voltage Mode) Or Voltage Limit (Current Mode) Using Grounded Low Impedance Voltage Source (Vs)

    FIGURE 3-12. ANALOG PROGRAMMING OF OUTPUT VOLTAGE (VOLTAGE MODE) OR VOLTAGE LIMIT (CURRENT MODE) USING GROUNDED LOW IMPEDANCE VOLTAGE SOURCE (VS) 3-39 BHK-MG (OPR) 032816...

  • Page 86: Analog Programming Of Output Current (Current Mode) Or Current Limit Voltage Mode) Using Isolated (Floating) Low Impedance Voltage Source (Vs)

    FIGURE 3-13. ANALOG PROGRAMMING OF OUTPUT CURRENT (CURRENT MODE) OR CURRENT LIMIT (VOLTAGE MODE) USING ISOLATED (FLOATING) LOW IMPEDANCE VOLTAGE SOURCE (VS) 3-40 BHK-MG (OPR) 032816...

  • Page 87: Analog Programming Of Output Current (Current Mode) Or Current Limit (Voltage Mode) Using Grounded Low Impedance Voltage Source (Vs)

    FIGURE 3-14. ANALOG PROGRAMMING OF OUTPUT CURRENT (CURRENT MODE) OR CURRENT LIMIT (VOLTAGE MODE) USING GROUNDED LOW IMPEDANCE VOLTAGE SOURCE (VS) The external voltage source is applied to the input of the uncommitted amplifier which is config- ured either as an inverting repeater (Figures 3-11 and 3-13) for isolated voltage sources or a dif- ferential amplifier having a gain of –1 (Figures 3-12 and 3-14) for grounded voltage sources.

  • Page 88: Voltage Mode

    3.6.3.1 VOLTAGE MODE With the power supply in voltage mode (see Figure 3-11 or 3-12) and the digitally programmed output voltage at zero, varying the low impedance voltage source from 0 to +10V causes the output voltage of the power supply to vary linearly from 0 to Eomax with a slope of (0.1 x Eomax) volts per volt.

  • Page 89: Current Mode

    3.6.3.2 CURRENT MODE With the power supply in current mode (see Figure 3-13 or 3-14) and the digitally programmed output voltage at zero, varying the low impedance voltage source from 0 to +10V causes the output current of the power supply to vary linearly from 0 to Iomax with a slope of (0.1 x Iomax) mA per volt.

  • Page 90: Analog Programming Of Output Voltage (Voltage Mode) Or Voltage Limit (Current Mode) Using High Impedance, Low Level (1V) Voltage Source (Vs)

    FIGURE 3-15. ANALOG PROGRAMMING OF OUTPUT VOLTAGE (VOLTAGE MODE) OR VOLTAGE LIMIT (CURRENT MODE) USING HIGH IMPEDANCE, LOW LEVEL (1V) VOLTAGE SOURCE (VS) 3-44 BHK-MG (OPR) 032816...

  • Page 91: Analog Programming Of Output Current (Current Mode) Or Current Limit (Voltage Mode) Using High Impedance, Low Level (1V) Voltage Source (Vs)

    FIGURE 3-16. ANALOG PROGRAMMING OF OUTPUT CURRENT (CURRENT MODE) OR CURRENT LIMIT (VOLTAGE MODE) USING HIGH IMPEDANCE, LOW LEVEL (1V) VOLTAGE SOURCE (VS) The external voltage source is applied to the input of the uncommitted amplifier which is config- ured as a noninverting amplifier having a gain of 10. 3-45 BHK-MG (OPR) 032816...

  • Page 92: Voltage Mode

    3.6.4.1 VOLTAGE MODE With the power supply in voltage mode (see Figure 3-15) and the digitally programmed output voltage at zero, varying the high impedance voltage source from 0 to –1V causes the output voltage of the power supply to vary linearly from 0 to Eomax with a slope of (Eomax) volts per volt.

  • Page 93: Programming With External Current Source (1 Ma)

    Iout = Output current programmed digitally (from either local keypad or remote GPIB bus) (See above for definitions of Rs and V 3.6.5 PROGRAMMING WITH EXTERNAL CURRENT SOURCE (1 mA) Figures 3-17 and 3-18 are simplified diagrams of the BHK-MG showing the jumper configuration and external connections required for analog programming using a current source (1mA).

  • Page 94: Analog Programming Of Output Current (Current Mode) Or Current Limit (Voltage Mode) Using Current Source (1Ma) (Cs)

    FIGURE 3-18. ANALOG PROGRAMMING OF OUTPUT CURRENT (CURRENT MODE) OR CURRENT LIMIT (VOLTAGE MODE) USING CURRENT SOURCE (1mA) (CS) The external current source is applied to the inverting input of the uncommitted amplifier which is configured as a current-voltage converter. CAUTION Observe the following to avoid damage to the power supply.

  • Page 95: Voltage Mode

    3.6.5.1 VOLTAGE MODE With the power supply in voltage mode (see Figure 3-17) and the digitally programmed output voltage at zero, varying the external current source from 0 to 1mA causes the output voltage of the power supply to vary linearly from 0 to Eomax with a slope of (Eomax) volts per mA. The fol- lowing equations give the output voltage as determined by the external current source I ANALOG PROGRAMMING, DIGITAL PROGRAMMING = 0: Eo =...

  • Page 96: Operating Modes

    OPERATING MODES This section describes the following operating modes for the BHK-MG power supply • Slow/Fast Mode • Series Operation • Automatic Series Operation • Master-Slave Series Operation • Parallel Operation • Automatic Parallel Operation • Master-Slave Parallel Operation 3.7.1 SLOW/FAST MODE OF OPERATION In slow mode of operation the internal output capacitor C is connected across the sensing...

  • Page 97: Slow Mode/Fast Mode Operation

    FIGURE 3-19. SLOW MODE/FAST MODE OPERATION If desired, an external output capacitor can also to be used; the following instructions apply when using an external output capacitor: a. Use a capacitor rated to more than the maximum output voltage of the power supply. If a series combination of polarized type capacitors is used, potential equalizer resistors in parallel with each capacitor should be installed and attention should be paid to the polarity of the capacitors: the “plus”...

  • Page 98: Series Operation

    3.7.2 SERIES OPERATION Kepco BHK-MG power supplies can be series-connected to increase output voltage if the pre- cautions outlined below are followed. Two basic series-connection methods are generally used: automatic (PAR. 3.7.2.1) and master-slave (PAR. 3.7.2.2).

  • Page 99: Automatic Series Operation

    BHK 2000-0.1MG is 0.2A. When this unit is con- nected in series with a model BHK 500-0.4MG, which has a maximum current rating of 0.4A, it is necessary to connect an external (reverse-biased) diode across the output of the 2000V unit which is rated for 3kV reversed voltage and 0.4A direct current.
  • Page 100 NOTE: If using two different BHK models, e.g., 500-0.4MG and 1000-0.2MG, unit A must be the one with the lower current capacity: 1000-0.2MG a. Program IsetA to the current limit for the power assembly. E o m a x A b.

  • Page 101: Series Automatic Configuration

    FIGURE 3-20. SERIES AUTOMATIC CONFIGURATION 3-55 BHK-MG (OPR) 032816...

  • Page 102: Master-Slave Series Operation (Automatic Tracking)

    3.7.2.2 MASTER-SLAVE SERIES OPERATION (AUTOMATIC TRACKING) This configuration is characterized by the fact that only the master power supply is programmed (controlled), while the slave power supply follows the command of the master in a ratio which may be predetermined by the user. This method is, therefore, often termed automatic tracking. A master-slave series combination with a single slave is shown in Figure 3-21 configured to operate in voltage mode, and in Figure 3-22 to operate in current mode.
  • Page 103 the power supply with the highest nominal output voltage; set the current limit of the other power supply to a larger value (1% larger or more). The load current is given by the equation, Io = Eo/R LOAD RECOMMENDED PROCEDURE. The following steps are recommended to ensure the combi- nation of power supplies (power assembly) configured for master-slave series (automatic track- ing) operation is connected and set up properly for voltage mode operation.

  • Page 104: Series Master-Slave (Voltage Mode) Configuration

    b. If load switch not used, press POWER ON/OFF key (once) on master unit, then slave unit. 6. To disable power to the load: c. If load switch used, open the switch. d. If load switch not used, press POWER ON/OFF key: once on the master unit, then once on the slave unit.

  • Page 105: 3.7.2.2.2 Current Mode Operation

    3.7.2.2.2 CURRENT MODE OPERATION When the series combination is operating in current mode (see Figure 3-22), the master is in current mode and receives current programming commands while output voltage is determined by the current through the load; the slave is in voltage mode and tracks the master output volt- age.
  • Page 106 The output current of the series combination operating in current mode is determined by the out- put current of the master: Io = Io , where Io is the output current of the master, in mA. The load voltage is Eo = Io where Eo is the output voltage of the series combination.

  • Page 107: Parallel Operation

    3.7.3 PARALLEL OPERATION Kepco BHK-MG power supplies can be parallel-connected for increased output current, if the precautions outlined below are followed. Two basic parallel-connection methods are generally used: automatic (PAR. 3.7.2.1) and master-slave (PAR. 3.7.2.2).:...

  • Page 108: Automatic Parallel Operation

    However, when very precise control of output volt- age applied to the load is desired, remote sensing should be used. Contact Kepco Applications Engineering when special configurations are indicated.

  • Page 109: Parallel Automatic Configuration

    FIGURE 3-23. PARALLEL AUTOMATIC CONFIGURATION 3-63 BHK-MG (OPR) 032816...

  • Page 110: Master-Slave Parallel Operation

    Program overcurrent value of unit B (IocsetB) to 1.1 x the rated maximum current for unit B (IomaxB), e.g., 1.1 x 400 = 440 mA for BHK 500-0.4MG. d. Program overvoltage value of unit B (VovsetB) to 1.1 x Eo.

  • Page 111: 3.7.3.2.1 Voltage Mode Operation

    3.7.3.2.1 VOLTAGE MODE OPERATION When the parallel combination is configured to operate in voltage mode (see Figure 3-24), the master operates in voltage mode, receiving voltage programming commands, and the slave tracks the output current of the master. FIGURE 3-24. PARALLEL MASTER-SLAVE (VOLTAGE MODE) CONFIGURATION 3-65 BHK-MG (OPR) 032816...
  • Page 112 The output voltage of the parallel combination in voltage mode is given by the equation, Eo = Eo where Eo is the output voltage of the master unit, in Volts. The load current is given by the equation, Io = Eo / R LOAD The individual currents of the master and slave supplies are, = Io...

  • Page 113: 3.7.3.2.2 Current Mode Operation

    2. The current of the slave unit will be slightly larger than the current of the master unit (minimum of 5% for BHK 500-0.4MG) due to the voltage drop on the wire connect- ing the internal sensing resistor to the externally accessible terminal TB1-2 (see Figure 3-25).

  • Page 114: Parallel Master-Slave (Current Mode) Configuration

    FIGURE 3-25. PARALLEL MASTER-SLAVE (CURRENT MODE) CONFIGURATION 3-68 BHK-MG (OPR) 032816...
  • Page 115 3. Program slave unit as follows: a. Program output current of slave unit (Iset ) to 0. b. Program Vset to the rated maximum voltage of the slave unit, Eomax (e.g., for BHK1000-0.2MG set Vset = 1000). c. Program overcurrent value of slave unit (Iocset ) to 1.1 x rated maximum current of slave unit, Iomax (e.g., for BHK 1000-0.2MG, program Iocset...

  • Page 117: Section 4 - Calibration

    20 ppm per degree C). During the calibration procedure the LCD displays the minimum requirements for the shunt resistor. However, to avoid problems due to drift caused by heat dissipation, Kepco recommends the following: – BHK 300-0.6MG: 1.67 Ohm, 0.01%, 50W...

  • Page 118: Voltage Calibration

    DVM reading as close as possible to full scale value. E.g., for BHK 500-0.4MG, adjust for DVM reading as close to +500.00V as possible. Press ENTER when complete and proceed to PAR. 4.3, step 4.

  • Page 119: High Current Calibration

    = Rs x Io (mV) where (mA) is the maximum value of output current: BHK 300-0.6MG: 0.6A = 600mA BHK 500-0.4MG: 0.4A = 400mA BHK 1000-0.2MG: 0.2A = 200mA BHK 2000-0.1MG: 0.1A = 100mA Rs (Ohms) is the actual value of the external shunt resistor (the same shunt resistor can be used for both Low and High scale current calibration).

  • Page 120: Low Current Calibration

    (mV) where (mA) is the maximum value of output current (low scale): BHK 300-0.6MG: 0.6/10 = 0.06A = 60mA BHK 500-0.4MG: 0.4/10 = 0.04A = 40mA BHK 1000-0.2MG: 0.2/10 = 0.02A = 20mA BHK 2000-0.1MG: 0.1/10 = 0.01A = 10mA Rs (Ohms) is the actual value of the external shunt resistor (the same shunt resistor can be used for both Low and High scale current calibration).

  • Page 121: Calibration Using Ivi Driver

    SETUP 1. The following calibration procedure uses a calibration panel which is part of the IVI driver for the BHK-MG 200W which can be downloaded from the Kepco website at: www.kepcopower.com/drivers.htm Unzip the files and double-click on setup.exe to install the driver in \Program Files\KepcodcPower\bhk\ 2.

  • Page 122: Main Control Panel

    ure 4-2. If an Initialization Error message appears, either the IVI Shared components or VISA-COM was not installed correctly. Return to step 1 and reinstall the driver. FIGURE 4-2. MAIN CONTROL PANEL, TYPICAL 4.4.2 MAIN CONTROL PANEL The main control panel allows setting the voltage and current, enabling and disabling the output, selecting the current range (full rack units), resetting the unit, and calibrating the unit.

  • Page 123: Calibration Procedure

    the output by a maximum of 18 steps (each step is one LSB (Least Significant Bit), equivalent to 0.024% of nominal value) at a time; the > and < buttons either increase (>) or decrease (<) the output one step at a time. FIGURE 4-3.

  • Page 124: Password Entry

    FIGURE 4-4. PASSWORD ENTRY 3. For Voltage Calibration, click YES button (see Figure 4-5). FIGURE 4-5. VOLTAGE CALIBRATION 4. The text window reads Connect DVM to Output Sense, Remove Shunt. Remove any connections between +OUT and –OUT. Connect DVM (high) to +OUT and DVM (low) to –OUT, then click OK button.

  • Page 125: Current Magnifier Window

    10.The text window reads CURR ZERO Adjust. Using the fine adjust < and > buttons (see PAR. 4.4.3), adjust output until DVM is as close to 0 as possible but slightly positive, then click OK button. 11. The text window reads CURR F.S.Adjust. Using the coarse << and >> and fine < and > buttons (see PAR.

  • Page 126: Changing The Calibration Password

    2. Enter the old password and press ENTER. (To exit without changing the password, press CLEAR.) Then enter the new 4-digit Password and press ENTER The password must have four digits; the default passwords are 0500 for BHK 500-0.4MG, 1000 for BHK 1000-0.2MG and 2000 for BHK 2000-.01MG.

  • Page 127: Restoring Previous Calibration Values

    RESTORING PREVIOUS CALIBRATION VALUES Each time the unit is calibrated, the previous calibration values are retained in non-volatile mem- ory. If it is determined that a new calibration is erroneous, the previous calibration values can be restored. 1. With the power supply in command entry status (:_:_:), press MENU key until the LCD reads GoTo Previous CALIB? 1(=_=_=)YES.

  • Page 128: Calibration Storage

    TABLE 4-4. CALIBRATION STORAGE COMMAND WORKing PRIor OLDest FACTory MASTer FIRst 1. CAL:SAVE Cal 1 values Factory cal. Master cal. First cal. 2. CAL:SAVE Cal 2 values Cal 1 values No Change No Change No Change 3. CAL:SAVE Cal 3 values Cal 2 values Cal 1 values No Change...

  • Page 129: Appendix A - Ieee 488.2 Command/Query Definitions

    APPENDIX A - IEEE 488.2 COMMAND/QUERY DEFINITIONS INTRODUCTION This appendix defines the IEEE 488.2 commands and queries used with the BHK-MG Power Sup- ply These commands and queries are preceded by an asterisk (*) and are defined and explained in Figures A-1 through A-14, arranged in alphabetical order.

  • Page 130: Esr? - Event Status Register Query

    The character string contains the following fields: <Manufacturer>, <Model>-<Voltage>-<Current> <Calibration Date>,<Serial number>,<Firmware revision> where: <Manufacturer> = KEPCO, <Model> = BHK, <Voltage> is Eo , <Current> is Io ) <Calibration Date>...

  • Page 131: A.10 *Rst - Reset Command

    *CLS Power supply clears status data. *ESE 60 Power supply enables bits 5, 4, 3 and 2, allowing command error, execution error, device dependent error and query error to set the Event Status Summary bit when an STB? query is executed. *ESE? Returns 60, (value of the mask) verifying that bits 5, 4, 3 and 2 are enabled.

  • Page 132: A.12 *Sre - Service Request Enable Command

    *SRE A.12 *SRE — SERVICE REQUEST ENABLE COMMAND Syntax: *SRE<integer> where <integer> = value from 0 - 255 per Table A-3, except bit 6 cannot be pro- grammed. The Service Request Enable regis- Description: Sets the condition of the Service Request Enable register. ter determines which events of the Status Byte Register are summed into the MSS (Master Status Summary) and RQS (Request for Service) bits.

  • Page 133: Appendix B - Scpi Command/Query Definitions

    APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS INTRODUCTION This appendix defines the SCPI subsystem commands and queries used with the BHK-MG Power Supply. Subsystem commands are defined in PAR. B.3 through B.91, arranged Alpha- betically in groups as they appear in the tree diagram, Figure 3-5. Table B-1 provides a quick reference of all SCPI subsystem commands and queries used in the BHK-MG Power Supply.

  • Page 134: Numerical Values

    To use these commands, refer to Kepco’s website (www.kepcopower.com/drivers) and download the LabWindows/ CVI Version 5 driver for BHK-MG. This file provides remote calibration capability and uses the follow-...

  • Page 135: B-1 Programming The Output

    CURR? Returns 5E-2 (programmed current 50mA) CURR:PROT? Returns 3.8E-2 , indicating programmed overcurrent protection current value = 38mA. CURR:PROT? MAX For BHK 500-0.4MG, returns 4.4E-1 (440mA, see Table 1-2). SYST:VERS? Returns 2003.0. FIGURE B-1. PROGRAMMING THE OUTPUT DISP:CONT 0.9 Sets LCD contrast value to 0.9.

  • Page 136: Display:mode Command

    DISP:MODE DISPlay:MODE COMMAND Syntax: Short Form: DISP:MODE NORM or DISP:MODE TEXT Long Form: DISPlay:MODE NORMal or DISPlay:MODE TEXT Description: Switches the LCD display between Normal and Text mode. Switches the display between its nor- mal metering mode and a mode in which it displays text sent by the user on the second line. The default status at power up or after *RST is NORMal.

  • Page 137: Instrument:state Command

    INST:STAT  B.14 INSTrument:STATe COMMAND Syntax: Short Form: INST:STAT <val> Long Form: INSTrument:STATe <val> Description: Operation is identical to OUTPut:STATe command (PAR. B.36) and is provided for compatibility with other vendors products. INST:STAT?  B.15 INSTrument:STATe? QUERY Syntax: Short Form: INST:STAT? Long Form: INSTrument:STATe <val>...

  • Page 138: Source:]List:current? Query

    LIST:CURR? B.22 [SOURce:]LIST:CURRENt? QUERY Syntax: Short Form: LIST:CURR? Long Form: LIST:CURRent? Return Value: <value1>, <value2>, . . . to <value16> Description: Identifies the parameters (main channel) entered for the list. Starting at location established by LIST:QUERy, returns comma-separated list of up to 16 values indicating the main channel parameters entered.

  • Page 139: Source:]List:query Command

    LIST:QUER B.29 [SOURce:]LIST:QUERy COMMAND Syntax: Short Form: LIST:QUER n Long Form: LIST:QUERy n n = int_value = 0 to 250 Description: Determines first location to be queried by LIST:VOLT?, LIST:CURR?, and LIST:DWEL? queries. Note that n = 0 points to location 0, otherwise n points to location (n-1). Related Commands: LIST:QUER?, LIST:VOLT?, LIST:CURR?, LIST:DWEL?.

  • Page 140: B-3 Using List Commands And Queries

    NOTE: Examples below are intended only to illustrate command functions. Refer to PAR. 3.3.6 for pro- gramming techniques to optimize performance. LIST:CLEAR Initializes the list processor to add entries, clears main channel (LIST:CURR or LIST:VOLT) and LIST:DWEL data tables. LIST:DWELL .010 Sets the time duration for location 0 to be 0.010 second (Since dwell times for the rest of the locations in the list are not entered before running the list, the dwell time will be 0.010 second for all locations.

  • Page 141: Measure[:Scalar]:Current[:Dc]? Query

    LIST:QUERY 0 Sets query pointer to zero. LIST:DWEL:POIN? Returns 1 indicating the next dwell time will be entered in location 1. LIST:DWELL .01,.01,.01,.01,.01,.01,.01,.01,.01 Enters dwell time of 0.01 seconds in locations 1 through 9. LIST:DWELL 1 Enters dwell time of 1 second in location 10. VOLT:MODE LIST the list is not executed, the unit returns error -221,Settings Error indicating the lists are not balanced.

  • Page 142: Source:]Current[:Level][:Immediate][:Amplitude] Command

    CURR B.38 [SOURCe:]CURRent[:LEVel][:IMMediate][:AMPlitude] COMMAND Syntax: Short Form: [SOUR:]CURR[:LEV][:IMM][:AMP] <exp_value> Long Form: [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] <exp_value> <exp_value> = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1 Description: Sets programmed current level at power supply output. This command programs output current to a specific value;...

  • Page 143: Source:]Current:mode? Query

    CURR:MODE? B.43 [SOURce:]CURRent:MODE? QUERY Syntax: Short Form: [SOUR:]CURR[:LEV]:MODE? Long Form: [SOURce:]CURRent[:LEVel]:MODE? Return value: FIXED or LIST Description: Identifies active voltage mode. Returns LIST while list is being executed. Returns FIXED while in fixed (default) mode of operation. Related Commands: LIST commands. (See example, Figure B-3.) CURR:PROT B.44 [SOURce:]CURRent:PROTection[:LEVel] COMMAND...

  • Page 144: Source:]Current[:Level]:Triggered[:Amplitude]? Query

    CURR:TRIG? B.49 [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude]? QUERY Syntax: Short Form: [SOUR:]CURR[:LEV]:TRIG[:AMP]? Long Form: [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude]? Return Value: <exp_value> = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1 Description: Returns value representing voltage value to be programmed by *TRG command established by CURR:TRIG command). (See example, Figure B-1.) NOTES: 1.

  • Page 145: Source:]Voltage:limit[:High]? Query

    VOLT:LIM[:HIGH]?  B.53 [SOURce:]VOLTage:LIMit[:HIGH]? QUERY Syntax: Short Form: [SOUR:]VOLT:LIM[:HIGH]? Long Form: [SOURce:]VOLTage:LIMit[:HIGH]? Return Value: <exp_value> = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1 Description: Returns value representing voltage limit set by VOLT:LIM[:HIGH] command. Related Com- mands: VOLT:LIM[:HIGH], VOLT. (See example, Figure B-5.) VOLT:MODE B.54 [SOURce:]VOLTage:MODE COMMAND...

  • Page 146: Source:]Voltage[:Level]:Triggered[:Amplitude]? Query

    VOLT 2.157E2 Power supply programmed to go to 215.7V. VOLT? Returns 2.157E2, indicating programmed voltage = 215.7V. VOLT? MAX For BHK 500-0.4MG, returns 500 (500V). VOLT? MIN Returns 0 (minimum allowable voltage). VOLT:PROT 2.365E+2 Voltage protection set to 236.5V. VOLT? Returns 2.157E+2, indicating programmed voltage value = 215.7V.

  • Page 147: Status:operation:enable Command

    STAT:OPER:ENAB  B.62 STATus:OPERation:ENABLe COMMAND Syntax: Short Form: STAT:OPER:ENAB <int_value> 0 to 1313 (1 + 32 + 256 + 1024) Long Form: STATus:OPERation:ENABle <int_value> 0 to 1313 (1 + 32 + 256 + 1024) Description: Sets Operation Enable Register. The Operation Enable Register is a mask for enabling specific bits in the Operation Event Register which will cause the operation summary bit (bit 7) of the Status Byte register to be set Bit set to 1 = function enabled (active, true);...

  • Page 148: Status:preset Command

    STAT:PRES  B.65 STATus:PRESet COMMAND Syntax: Short Form: STAT:PRES Long Form: STATus:PRESet Description: Disables reporting of all status events. This command sets all bits of the Operation Condition (Table B-2) and Questionable Condition Registers to 0, preventing all status events from being reported. (See example, Figure B-6.) STAT:QUES? ...

  • Page 149: System:beep Command

    SYST:BEEP B.70 SYSTem:BEEP COMMAND Syntax: Short Form: SYST:BEEP Long Form: SYSTem:BEEP Description:Causes the unit to emit a brief audible tone SYST:COMM:GPIB:ADDR B.71 SYSTem:COMMunication:GPIB:ADDRess COMMAND Syntax: Short Form: SYST:COMM:GPIB:ADDR<INT VAL> 1 to 30 Long Form: SYSTem:COMMunication:GPIB:ADDRess<INT VAL> 1 to 30 Description: Sets selected power supply GPIB address. See PAR. 3.3.6.2 and Figure 3-2 for special program- ming considerations.

  • Page 150: System:communication:serial:pace? Query

    SYST:COMM:SER:PACE?  B.78 SYSTem:COMMunication:SERial:PACE? QUERY Syntax: Short Form: SYST:COMM:SER:PACE? Long Form: SYSTem:COMMunication:SERial:PACE? Return Value: {01 | 00} Description: Returns 01 when data flow control via the serial interface is enabled (XON) or 00 when disabled (NONE) (see PAR. 3.4.3.3). SYST:COMM:SER:PROM B.79 SYSTem:COMMunication:SERiaL:PROMpt COMMAND Syntax: Short Form: SYST:COMM:SER:PROM {ON | OFF} or {0 | 1}...

  • Page 151: B.84 System:klock Command

    SYST:KLOC  B.84 SYSTem:KLOCk COMMAND Syntax: Short Form: SYST:KLOC <boolean> Long Form: SYSTem:KLOCk <boolean> <boolean> (0 or OFF, 1 or ON) Description: Locks (ON or 1) or unlocks (OFF or 0) the keypad. With the keypad unlocked the power supply enters Remote mode as soon as a command or query is received.

  • Page 152: B-4 Error Messages

    SYST:SEC:IMM  B.90 SYSTem:SECurity:IMMediate COMMAND Syntax: Short Form: SYST:SEC:IMM Long Form: SYSTem:SECurity:IMMediate Description: Initializes all NVRAM variable to factory defaults. This includes all memory steps to be set to 0 volts, minimum Amperes, overvoltage and overcurrent to be set to Eomax+10% and Iomax+10%, respec- tively, time value to be set to 0.01 Sec.
  • Page 153 TABLE B-4. ERROR MESSAGES (CONTINUED) ESR ERROR BIT SET ERROR MESSAGE EXPLANATION (SEE PAR. A.5) -221,”Settings Conflict” Execution error bit 4 Invalid password from syst:pass:cen command. -222,“Data out of range” Execution error bit 4 Value exceeds power supply rating. -223,”Data format error” Execution error bit 4 Multiple decimals in digit, Multiple E, etc.

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